SU371202A1 - METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS - Google Patents

METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS

Info

Publication number
SU371202A1
SU371202A1 SU1650439A SU1650439A SU371202A1 SU 371202 A1 SU371202 A1 SU 371202A1 SU 1650439 A SU1650439 A SU 1650439A SU 1650439 A SU1650439 A SU 1650439A SU 371202 A1 SU371202 A1 SU 371202A1
Authority
SU
USSR - Soviet Union
Prior art keywords
fatty acids
xylite
xylitol
dimethylformamide
obtaining complex
Prior art date
Application number
SU1650439A
Other languages
Russian (ru)
Inventor
В. Н. Балахонцева Г. Я. Володарска Л. А. Нахапег
Original Assignee
Всесоюзный научно исследовательский институт биосинтеза белковых веществ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Всесоюзный научно исследовательский институт биосинтеза белковых веществ filed Critical Всесоюзный научно исследовательский институт биосинтеза белковых веществ
Priority to SU1650439A priority Critical patent/SU371202A1/en
Application granted granted Critical
Publication of SU371202A1 publication Critical patent/SU371202A1/en

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

1one

Изобретение относитс  к способу получени  сложных эфиров ксилита и жирных кислот, которые могут быть использованы как эмульгаторы , антисептики, диспергаторы и т. д.This invention relates to a process for the preparation of xylitol esters of fatty acids, which can be used as emulsifiers, antiseptics, dispersants, etc.

Известен способ получени  сложных эфиров ксилита переэтерификацией эфиров низших спиртов жирных кислот ксилитом в среде пиридина в присутствии в качестве катализатора карбоната щелочного металла при 90 - 110°С, остаточном давлении 250 мм рт. ст. в токе инертного газа азота в течение 12- 24 час. Выход продуктов переэтерификации 60%.A known method for producing xylitol esters by transesterification of lower fatty acid alcohols with xylitol in pyridine in the presence of alkali metal carbonate as a catalyst at 90-110 ° C, residual pressure of 250 mmHg. Art. in a stream of inert nitrogen gas for 12-24 hours. The output of transesterification products is 60%.

С целью сокращени  продолжительности процесса и увеличени  выхода целевого продукта предлагаетс  вести переэтерификацию эфиров жирных кислот при температуре 70- 75°С, остаточном давлении 40-70 мм рт. ст., преимущественно с применением в качестве растворител  диметилформамида в присутствии потаща как катализатора при непрерывной отгонке азеотропной смеси диметилформамид-низший спирт в течение 10-12 час.Выход моноэфира 75-80%По предлагаемому способу значительно улучшаютс  услови  труда при замене токсичного пиридина диметилформамидом.In order to reduce the duration of the process and increase the yield of the target product, it is proposed to transesterify fatty acid esters at a temperature of 70-75 ° C and a residual pressure of 40-70 mm Hg. predominantly using dimethylformamide as a solvent in the presence of a catalyst during continuous stripping of the azeotropic mixture of dimethylformamide-lower alcohol for 10-12 hours. Monoether 75-80% yield The proposed method significantly improves working conditions when replacing toxic pyridine with dimethylformamide.

Пример 1. Смесь 456 г ксилита (влажность до 0,5%), 298 г метилстеарата, 14 г поташа и 1500 млдиметилформамидаExample 1. A mixture of 456 g of xylitol (moisture content up to 0.5%), 298 g of methyl stearate, 14 g of potash and 1500 ml of dimethylformamide

(«Лч 1,4299) перемешивают при температуре 70-75°С, остаточном давлении 50- 70 мм рт. ст. и непрерывной отгонке азеотропной смеси диметилформамид-метанол в течение 8-10 час. Затем добавл ют 3,5 мл обессоленной воды, ведут реакцию еще 2 час, после чего полностью отгон ют растворитель. Обработку готового продукта ведут одним из известных способов.(“Lh 1.4299) is stirred at a temperature of 70-75 ° C, residual pressure of 50-70 mm Hg. Art. and continuous distillation of the azeotropic mixture of dimethylformamide-methanol for 8-10 hours. Then 3.5 ml of desalted water is added, the reaction is continued for another 2 hours, after which the solvent is completely distilled off. Processing of the finished product are one of the known methods.

Получают 315 г продукта с числом омылепи  134. кислотным числом 0,5-0,7; процентом гидроксилов 15-16.Get 315 g of the product with the number of saponifiers 134. acid number of 0.5-0.7; the percentage of hydroxyls 15-16.

Пример 2. По примеру 1 из смеси 456 г ксилита (влажность до 0,5%), 228 г этиллаурата , 14 г поташа и 1500 мл диметилформамида получают 260 г продукта с числом омылени  167, кислотным числом 0,5-0,7, процентом гидроксилов 18-19.Example 2. In Example 1, from a mixture of 456 g of xylitol (moisture content up to 0.5%), 228 g of ethyl laurate, 14 g of potash and 1500 ml of dimethylformamide, 260 g of product with an saponification number of 167 and acid number of 0.5-0.7 are obtained, percentage of hydroxyls 18-19.

Предмет изобретени Subject invention

2020

Claims (2)

I. Способ получени  сложных эфиров ксилита и лсирных кислот путем переэтерификации сложных эфиров низших спиртов жирныхI. The method of producing esters of xylitol and lsiric acids by transesterification of esters of lower fatty alcohols 25 кислот ксилитом при нагревании в вакууме в присутствии в качестве катализатора щелочного карбоната в среде органического растворител  с последующим выделением продукта известным способом, отличающийс  тем, что,25 acids by xylitol when heated in vacuum in the presence of alkali carbonate as a catalyst in an organic solvent medium, followed by separation of the product in a known manner, characterized in that 30 с целью сокращени  продолжительности процесса и увеличени  выхода целевого продукта , переэтерификацию ведут при температуре 70-75°С/40-70 мм рт. ст. 30 in order to reduce the duration of the process and increase the yield of the target product, the transesterification is carried out at a temperature of 70-75 ° C / 40-70 mm Hg. Art. 2. Способ по п. 1, отличающийс  тем, что в качестве органического растворител  используют диметилформамид и процесс ведут с отгонкой образующегос  в реакции спирта в виде азеотропа.2. A method according to claim 1, characterized in that dimethylformamide is used as an organic solvent and the process is carried out by distilling off the alcohol formed in the reaction as an azeotrope.
SU1650439A 1971-04-26 1971-04-26 METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS SU371202A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1650439A SU371202A1 (en) 1971-04-26 1971-04-26 METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1650439A SU371202A1 (en) 1971-04-26 1971-04-26 METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS

Publications (1)

Publication Number Publication Date
SU371202A1 true SU371202A1 (en) 1973-02-22

Family

ID=20473434

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1650439A SU371202A1 (en) 1971-04-26 1971-04-26 METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS

Country Status (1)

Country Link
SU (1) SU371202A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010046726A1 (en) * 2008-10-20 2010-04-29 Chemyunion Química Ltda. Xylitol esters and ethers applied as alternative emulsifiers, solvents, co-emulsifiers and preservative systems for pharmaceutical and cosmetic products

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010046726A1 (en) * 2008-10-20 2010-04-29 Chemyunion Química Ltda. Xylitol esters and ethers applied as alternative emulsifiers, solvents, co-emulsifiers and preservative systems for pharmaceutical and cosmetic products
US20110251415A1 (en) * 2008-10-20 2011-10-13 Chemyunion Quimica Ltda. Xylitol esters and ethers applied as alternative emulsifiers, solvents, co-emulsifiers and preservative systems for pharmaceutical and cosmetic products
US8716506B2 (en) 2008-10-20 2014-05-06 Chemyunion Quimica Ltda. Xylitol esters and ethers applied as alternative emulsifiers, solvents, co-emulsifiers and preservative systems for pharmaceutical and cosmetic products

Similar Documents

Publication Publication Date Title
KR20120056844A (en) Process for the purification of crude glycerol
EP1081126A2 (en) Process for the preparation of plasticiser esters
US2515304A (en) Hydrolysis of 2,5-dihydrofurans to produce unsaturated dicarbonyl compounds
SU371202A1 (en) METHOD OF OBTAINING COMPLEX ETHERS OF XYLITE AND FATTY ACIDS
US3943167A (en) Process for preparing trans-chrysanthemic acid
JPS61152726A (en) Production of modified poly(tetramethylene ether)glycol
JPS622568B2 (en)
EP1672053B1 (en) High purity palm monoglycerides
US3959389A (en) Method of manufacturing alkylene oxide adducts of an aliphatic alcohol
SU427923A1 (en) METHOD FOR OBTAINING COMPLEX ETHERS OF UNCONTENT PURPOSE OF OXYCARBONIC ACIDS
US3932531A (en) Method of manufacturing alkylene oxide adducts of an aliphatic alcohol
SU448636A3 (en) The method of obtaining trans-chrysanthemic acid
SU455090A1 (en) The method of producing esters of penta-0- / -carboxyethyl / -xylite
Javaid et al. Selenium Dioxide Oxidation of Styrene and Norbornene
JP3168700B2 (en) Method for producing sucrose fatty acid ester
SU98700A1 (en) Method for preparing chlorophenoxyacetic acid esters
JP2002234886A (en) Method for producing acetal
JPS6210521B2 (en)
SU639889A1 (en) Method of obtaining b-(n-anabasine)ethyl ether of methacrylic acid
SU322986A1 (en) The method of producing cyclopropanecarboxylic acid esters
JP2001181271A (en) Method for producing alpha-monoglyceride ketal
JPS6345660B2 (en)
SU563415A1 (en) Method of producing 2-(1-hydroxyethyl)-4.5.6.7-tetrahydroiso-(or methanoiso)indoles
JP2002234862A (en) Method for producing monoglyceride
SU975704A1 (en) Process for producing ethyleneglycol monoformiate